Product Description The Advanced Armament Corp (AAC) Blackout Flash Hider is the standard mounting interface for AAC&';s entire Blackout suppressor line. Engineered for 5.56 NATO and .223 caliber platforms with a 1/2x28 thread pitch, this muzzle device features AAC&';s proprietary 51-tooth ratchet lock (51T) system, enabling tool-free suppressor attachment and removal with repeatable, zero-shift indexing. The vented flash hider body delivers effective flash signature reduction as a standalone device, making it a fully functional muzzle device even when used without a suppressor. Finished in AAC&';s durable SCARmor black coating, it provides long-lasting corrosion resistance and reliable performance in demanding field conditions. Product Highlights 51T Ratchet Mount Interface: Tool-free, quick-detach suppressor attachment and removal with repeatable zero-shift indexing Suppressor Ready: Compatible with all AAC Blackout-mount suppressors, including the M4-2000 and 762-SDN-6 5.56 NATO / .223 Compatible: Designed for rifles with standard 1/2x28 muzzle threads Standalone Flash Reduction: Vented flash hider body provides effective muzzle flash suppression even without an attached suppressor SCARmor Black Finish: Corrosion-resistant proprietary coating built for field durability and longevity Specs Brand: Advanced Armament Corp (AAC) Model: Blackout Flash Hider Caliber: 5.56 NATO / .223 Thread Pitch: 1/2x28 Mount Interface: 51T (51-Tooth Ratchet) Finish: SCARmor Color: Black MPN: 64141 UPC: 850036491057 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>